The old Answer Bot worked off keyword matching and decision trees: it would try to match what a customer typed to a help center article and suggest it, hoping the customer self-served. That's not how the current version works.
Zendesk folded Answer Bot into "AI agents" branding through 2023 and 2024, and the underlying capability changed along with the name. Today's AI agents use generative language models to read the message, pull relevant facts from your connected knowledge, and write an answer in their own words rather than pointing at an article. They can hold a multi-turn conversation and keep context as a customer follows up.
On the more advanced capability tier, an AI agent can also take API-backed actions, like looking up an order or checking a status, rather than only drafting text. Zendesk generally prices the advanced, action-taking tier separately from base plans, often tied to resolutions rather than a flat per-agent fee, so it's worth checking current pricing details for your plan rather than assuming it's bundled in.